Links

Here is a Mozilla Firefox add-on known as FireUploader that allows to upload/download files from your favorite websites using a simple interface.

In this version, Box.net (1GB of free space), Flickr (photo viewing/sharing), Picasa (photo viewing/sharing), Youtube(Vidoes) are supported. You can upload videos to Youtube, upload/download/organize photos to Picasa, Flickr and Box.net. Next versions would support other websites like Google Videos, Webshots etc.